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From: Stephen Hemminger <stephen@networkplumber.org>
To: Isaac Boukris <iboukris@gmail.com>
Cc: users@dpdk.org
Subject: Re: Accuracy of rte_get_tsc_hz() compared to linux
Date: Thu, 19 Sep 2024 14:53:50 -0700	[thread overview]
Message-ID: <20240919145350.423df1ce@hermes.local> (raw)
In-Reply-To: <CAC-fF8TBY03BDgUaTgL5Qn4G9q134hh8cZR89SQ=ifL+YhCM9g@mail.gmail.com>

On Thu, 19 Sep 2024 01:04:40 +0300
Isaac Boukris <iboukris@gmail.com> wrote:

> Hi,
> 
> On Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz (see lscpu output at the end).
> 
> The rte_get_tsc_hz() returns 2100000 KHz but using it causes our
> timestamps to lag behind real time (roughly a sec per 10 min). I
> noticed the kernel uses 2095082 KHz and in fact it gives much better
> results.

FYI there is a bug from 2022 about this:

https://bugs.dpdk.org/show_bug.cgi?id=959

  parent reply	other threads:[~2024-09-19 21:53 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-09-18 22:04 Isaac Boukris
2024-09-18 23:27 ` Stephen Hemminger
2024-09-19  9:37   ` Isaac Boukris
2024-09-19 12:26   ` Isaac Boukris
2024-09-19 13:04     ` Isaac Boukris
2024-09-19 18:33       ` Isaac Boukris
2024-09-19 21:53 ` Stephen Hemminger [this message]
2024-09-19 22:02 ` Stephen Hemminger
2024-09-19 22:21 ` Stephen Hemminger
2024-09-20  3:19   ` Isaac Boukris
2024-09-20 14:39     ` Stephen Hemminger
2024-09-20 15:06       ` Isaac Boukris
2024-09-21  6:36         ` Isaac Boukris
2024-09-20  7:26   ` David Marchand
2024-09-20 14:36     ` Stephen Hemminger
2024-09-20 15:11       ` Isaac Boukris

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